Car-bolster.



I. L. IRWIN.

GAR BOLSTER.

APPLICATION FILED FEB. 21, 1908 Paltehted 0011.6,1908.

INVENTOR. FRANK L/Rw/N.

W1 TNESSES:

I thereon appropriately,

- exten center plate i l is adaptedto be secured by considering the ualit of t e finished. y

t Fig. 3 is'a vertical side flanges 2 the flange r shownin Fig. 1

i Tn

FRANK L. IRWIN,

srerns OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

GAR-BOL3TER.

No. co er/s.

Specification e2 Letters i 'atent.

' Eatented Oct. 6, 190a.

' Application filed. February 21,1903.- seen at. M'MQZ.

To all wlwmit may concern; 1

Be it known that LFRANK L. lnwrn a citizen of the United States, residing at olurnbus, in the'county of Franklin and State of Ohio, have invented certain new and useful in rovernents inCar-Bolsters, of which the fol owing is a specification.

My invention relates to improvements in bolsters for cars, especially in cast bolsters having secured thereto a truss plate ad'acent to its ends, the bolster being so formed as to have great strength in a com act and symmetrical form, and is chea y constructed bolster when It further consists in a cast bolster having the center plate and side bearings arranged either constructed of independent members secured to the. bolster or being cast integral therewith- In the accompanying drawings which are hereto attached. and hereby made a part of this specification, Figure 1.is a plan view oi the bolster Fig. 2 is aside elevation thereof; transverse section along the line B-B of Fig. 2; Fig. 4. is a vertical transverse section along the line A-A of Fig. 2. l

Referring to the drawings in which the same numeral indicates the same part throughout, 1 is the bolster cast with the and 3 at the sides thereof, and the reinforcing portion 4, through which is formed the opening 5 for the insertion of the king bolt or pin. Adjacent the ends the'outwardly extending flanges 2 and 3 cease and the up or faces 6 and 7 formed on the web 8 to the end of the bolster; at that point this upper face is carried downwardly as shown at 9 and at the lower side of the end it is bent horizontally as shown at 10, so that adjacent to-its ends across section of the holster has the appearance of an I-beam. The upper face ll. of the bolster formed of ortions fi and i is proyided as with the openings Mend 13 thorethrough, whereby the side bearings 16 and 17 may be secured to said bolster. The

bolts or rivets 15 upon the upper face ll of the bolster. if preferred, the side bearings 16 and I7 may be cast integral with the holster, although they are shown in Figs. 1 and 2 as being independent members secured thereon.

'flangeportion 10 (Fig. 4) -or rivets 21 inserted therethrough, and the end ortion of said truss plate ward y upper face of The bolster: herein described rests at its endsupon the balls or rollers 24 upon the truck, and it may be properly described as the truck bolster, the body bolster being adapted to be mounted in the center plate 14. This truck bolster is strengthened by the provision of thetruss plate 18', which is received between theai'cwn turned flanges 19 and 20 ofthe body of the bolster (Fig. 3)", and held by said flanges against lateral displacement; the truss plate from this portion of the bolsterinclines'upwardly in both directions towards the ends of the bolster, and is secured to the by means of bolts is bent upat 22 toembrace and engage against the outer end of the bolster and is secured thereto by bolts or rivets shown at 23; the construction at the opposite end of the bolster is thesame as that described: Thetruss plate, it is seen, serves to brace and strengthen the bolster construction and render the same very strong, and being formed wide it embraces the flange construction adjacent the ends of the bolster 4 gives sufiicient sup ort tll'ereto. It is seen that the bolster is ormed heavy where the greatest strain is exerted thereon, and is tapered symmetrically out o the ends thereof over a wide suriacev and where the wide flange portion is provided for the purpose of adding strength at its outer point. My bolsten'scompact and symmetrical in outline and very strong and sufii-" cientlybraced by the truss plate without adding greatly to its bulk.

What I claim is:

l; A bolster castwith a heavy central portion. and tapering -towards its extremities, lateral flanges formed u on its extremities, a truss plate positioned enea'th the central portion of said bolster and extending to the outer faces of the extremities thereof and having flanged extensions thereon to engage -'the flanged egrtremities-of'said bolster.

-2. A' cast bolster tapering-in both directions towards its ends from its center on its upper face, a lower reinforcing portion formed thereon, side bearings formed on the said bolster, a center plate secured to the upper face of said bolster, said bolster being formed with lateral flanges at its ends and adjacent thereto, and a truss platepositioned beneath the central portion of said bolster and extending in both directions to the outer faces of the ends of said bolster, and having upwardly bent ends formed thereon to engage the outer face of the flanges formed on the ends of said bolster, and means for securing said truss plate to said bolster.

3. A east bolster formed with a heavy central Web portion, lateral flanges thereon forming the upper face thereof and extending around the ends and along the lower sides thereof, a truss plate positioned beneath the central portion of said bolster and extending to the ends thereof to overlap the outer feces of the same, and means for securing said truss to said llange portion of said bolster both on its lower side and at the ends thereof. In testimony \vhereol' l :l-lllX my signature in the presence of two Witnesses.

l lR/XNK L. IRWIN. Witnesses HORACE S. KERR, A. Room. 

